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Comparative Study
. 2007 Aug 23;12(8):2047-60.
doi: 10.3390/12082047.

Antibacterial Effect of Five Zingiberaceae Essential Oils

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Free PMC article
Comparative Study

Antibacterial Effect of Five Zingiberaceae Essential Oils

Krittika Norajit et al. Molecules. .
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Abstract

Essential oil obtained by hydrodistillation and two different solvent extractions (petroleum ether and ethanol) from five Zingiberaceae species: ginger (Zingiber officinale Roscoe.), galanga (Alpinia galanga Sw.), turmeric (Curcuma longa L.), kaempferia (Boesenbergia pandurata Holtt.) and bastard cardamom (Amomum xanthioides Wall.) was characterized. Volatile components of all extracts were analyzed by gas chromatography-mass spectrometry (GC-MS). The major components of ginger, turmeric, galangal, bastard cardamom and kaempferia were zingiberene, turmerone, methyl chavicol, and gamma-terpinene, respectively. Their antibacterial effects towards Escherichia coli, Staphylococcus aureus, Bacillus cereus and Listeria monocytogenes were tested by a disc diffusion assay. Essential oil of kaempferia and bastard cardamom obtained by hydrodistillation extraction could inhibit growth of all tested bacteria. Essential oil of ginger extracted by hydrodistillation had the highest efficiency against three positive strains of bacteria (S. aureus, B. cereus and L. monocytogenes), with a minimum concentration to inhibit B. cereus and L. monocytogenes of 6.25 mg/mL.

Figures

Figure 1
Figure 1
Volatile compounds in ginger extracts obtained by (a) hydrodistillation (b) petroleum ether (c) secondary extraction with ethanol and (d) ethanol.
Figure 2
Figure 2
Volatile compounds in galangal extracts obtained by: (a) hydrodistillation (b) petroleum ether (c) secondary extraction with ethanol and (d) ethanol.
Figure 3
Figure 3
Volatile compounds of turmeric extracts obtained by (a) hydrodistillation (b) petroleum ether (c) secondary extraction with ethanol and (d) ethanol.
Figure 4
Figure 4
Volatile compounds of kaempferol extracts obtained by (a) hydrodistillation (b) petroleum ether (c) secondary extraction with ethanol and (d) ethanol.
Figure 5
Figure 5
Volatile compounds of bastard cardamom extracts obtained by (a) hydrodistillation (b) petroleum ether (c) secondary extraction with ethanol and (d) ethanol.
Figure 6
Figure 6
Structures of major components in essential oils from five Zingiberaceace sp.

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